Please select a subject first
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Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?
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Arrange the following statements in the correct sequence
- These vapours condense to form tiny droplets of water.
- The water droplets come together to form large water droplets.
- The heat of the sun causes the evaporation of water from the surface of the earth, oceans, lakes, rivers, and other water bodies.
- The large water droplets become heavy and the air cannot hold them, therefore, they fall as rain.
- Water vapour is also continuously added to the atmosphere through transpiration from the surface of the leaves of trees.
- Warm air carrying clouds rises up.
- Higher up in the atmosphere, the air is cool.
- These droplets floating in the air along with the dust particles form clouds.
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Analogy
Population explosion : Water scarcity :: Recycle : ______
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Differentiate between surface water and ground water.
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About 71% of the earth’s surface is covered with water, then why do we face scarcity of water?
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Assertion: Oxygen is a compound.
Reason: Oxygen cannot be broken down into anything simpler.
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Phenol is ______.
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Concentrated phenol is used as a disinfectant.
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Mention any three physical properties of phenol.
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Write notes on phyllode.
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Motion repeated in equal intervals of time is called ______.
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What is meant by compound?
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Skinny appearance and slow body growth are the symptoms of ______ disease.
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How does a Balanced diet help our body?
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By the process of Heating of water, ______ is obtained.
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Water into steam on heating is called freezing.
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In Rockets, along with fuel, oxygen is also carried for combustion – why?
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A process without emitting flame is called as ______.
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Match the following
| 1. | Burning of meteors | a. | Exosphere |
| 2. | Weather change | b. | Stratosphere |
| 3. | Lowest temperature | c. | Mesosphere |
| 4. | Ozone layer | d. | Troposphere |
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